Table 2: This table comprises all lines used for the abundance analysis. In Cols. 3 and 4 we compiled the contributions of blend lines and additional comments, respectively.
Element/Ion Wavelengths Blends Comments   
Helium He I 5876 weak Fe II blend of 5 He I lines 
  He I 6678 weak Fe II/Si II $\ga$ 15 000 K He I 6 times stronger than blends 
  He I 7065 none useful $\ga$ 12 000 K  
Carbon C II 3918/3920 H$_{\zeta}$ (3889 Å), Ca II K (3934 Å) blends have well-known gf values, clearly traceable 
    weak Fe II/Ti II/S II blends become weaker with rising $T_{\rm eff}$ 
  C II 4267 weak Fe I/Fe II/S II blend of 3 C II lines, C II becomes stronger with rising $T_{\rm eff}$ 
  C II 6578 weak Fe II C II becomes stronger with with rising $T_{\rm eff}$ 
Oxygen O I 7771 weak Fe II on red wing O I triplet, suitable for the determination of $v \sin i$ 
Neon Ne I 6402 none tracer for weak stellar winds, useful $\ga$ 11 500 K  
  Ne I 6506 none tracer for weak stellar winds, useful $\ga$ 11 500 K  
Magnesium Mg II 4481 weak Fe II Mg triplet, suitable for the determination of $v \sin i$  
    weak He I (4471 Å) of minor importance for fast rotators 
Silicon Si II 4128/4130 weak Mn II/Fe II  
  Si II 5041/5ß55 weak Fe I  
  Si II 6374 two weak Mg II lines  
  Si II 6371 one weak Fe I line  
Calcium Ca II K 3934 31 weak blend lines indicator for diffusion processes  
      K line used for detection of CS gas  
Iron Fe II 4233 weak Fe I  
  Fe II 4584 weak Ti II/Cr II blend of four Fe II lines  
Strontium Sr II 4077 weak Fe I/Si II diffusion indicator, weaker Sr II line with rising $T_{\rm eff}$ 
  Sr II 4215 weak Cr II/Fe I diffusion indicator, weaker Sr II line with rising $T_{\rm eff}$ 
  Sr II 4305 weak Fe II/Ti II diffusion indicator, weaker Sr II line with rising $T_{\rm eff}$ 
Barium Ba II 4554 weak Fe II/Cr II/S II diffusion indicator, weaker Ba II line with rising $T_{\rm eff}$ 


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